This required working around internal ctor that uses internal (non
re-generated) types. E.g.
```
build/dotnet/maccatalyst/ref/Xamarin.iOS.cs(9201,64): error CS0234: The type or namespace name 'ABFunc<>' does not exist in the namespace 'AddressBookUI' (are you missing an assembly reference?)
```
We cannot just skip such constructor since the C# compiler will add a
**public** default one when none is present (and that's the case for
the error above),
This also required fixing the ctor chaining code (which can't be shared
with the, previously fixed, override code) so base classes could be
called for some `*EventArg` types.
Follow up to https://github.com/xamarin/xamarin-macios/pull/10658 , https://github.com/xamarin/xamarin-macios/pull/10678 and https://github.com/xamarin/xamarin-macios/pull/10706
This is the last framework that needs removal - but there's still a few
`unknown-*` entries in Catalyst-supported frameworks (more PR coming).
* Fix system version checks to work properly on Mac Catalyst (which uses the macOS
version as its system version).
* Add the framework-specific defines to the build for monotouch-test.csproj (using
the generated response files), this way we can use them in the tests.
* Sprinkle conditionals in numerous places - I tried using either framework-specific
or XAMCORE_3_0 whenever that made since (instead of using Mac Catalyst as a condition).
* Updated a few tests to use non-deprecated API (because the deprecated API often
doesn't exist in Mac Catalyst).
* Also a few minor API fixes to make any corresponding tests compile.
* Fix many version checks to be based on Xcode version instead of iOS version.
* Added/fixed a few expected values according to platform version to match behavior in older macOS versions.
* Bump to Xcode 9 beta 2
* [CoreImage] Stub out new CIImage filters in Xcode 9 beta 2.
* [monotouch-test] Update tests according to Xcode 9 beta 2.
* [xharness] Ask watch simulator tests to write output directly to a file.
It seems the watch simulator in Xcode 9 beta 2 has completely lost network
access (everything times out), so instead ask the tests to store results
directly in the resulting file.
This works for now since the watch simulator does not enforce the sandbox.
* [xharness] Rewrite the logic to write unit output to a file so that it works with Jenkins.
For Jenkins we ask the unit tests to produce XML, and this needs some special
treatment.
* [xharness] Protect against exceptions in the listener thread, so that it doesn't take xharness down.
* [xharness] Protect against a potential NullReferenceException, and fix one case where it would occur.
* [xharness] A few logging fixes.
* [Intents] Fix API & tests according to beta 2 changes.
Rolf Bjarne Kvinge
Alex Soto
Sebastien Pouliot
Vincent Dondain
Sebastien Pouliot
Timothy Risi
Vincent Dondain